Countries that lasted for less than 50 years

This empire briefly got independence from the Roman's before getting reconquered.

This democratic China fell to communism during the cold war.

Prussia claimed this title after uniting the German people

This is Napoleon's great empire

This is a brief country that declared independence during the collapse of the Ottomans

While Germany was split between democracy and communism this side was the democratic one.

This is a constitutional monarchy in Iraq that didn't last long.

This is a brief dictatorship in Central Africa that was stopped by the French intervening

This country declared independence from mexico and was independent for 10 years before joining the US

This country had conquered Manchuria in the beginning of WW2

This country was a German puppet state during WW2

This is Alexander the Great's empire

The first Islamic caliphate

This country gained land during WW1 and lost to the axis in WW2 and later split into 7 countries

This is a axis member during WW2 that had conquered ethiopia

Cnut the Great's viking empire that had conquered England

A short lived Central Asian Khanate that reached all the way to south Russia